Biased and Unbiased

Front

What does 'biased' mean in the context of surveys?

Back

'Biased' refers to a situation where the sample selected for a survey does not represent the entire population, leading to skewed or inaccurate results.

Front

What does 'unbiased' mean in the context of surveys?

Back

'Unbiased' means that the sample selected for a survey accurately represents the entire population, allowing for fair and accurate results.

Front

Why is it biased to ask only a baseball team about favorite sports?

Back

Because the sample is not representative of the entire school population, as it only includes students who play baseball.

Front

What is an example of an unbiased survey method?

Back

Asking every 10th person who enters a public library is unbiased because it includes a random selection of the library's visitors.

Front

How does random selection contribute to unbiased results?

Back

Random selection ensures that every individual in the population has an equal chance of being chosen, reducing the risk of bias.

Front

What is a potential bias in surveying students in a hallway?

Back

If the survey is conducted only during lunch, it may miss students who do not eat lunch at school, leading to biased results.

Front

What is the importance of sample size in surveys?

Back

A larger sample size generally leads to more reliable results, as it better represents the population.

Front

What is a systematic sampling method?

Back

Systematic sampling involves selecting every nth individual from a list or queue, which can help reduce bias.

Front

How can bias affect the results of a survey?

Back

Bias can lead to incorrect conclusions about the population's preferences or behaviors, making the survey results unreliable.

Front

What is an example of a biased survey question?

Back

Asking 'Do you agree that our school's sports teams are the best?' leads to bias because it suggests a positive response.